I think you will only get any type of difference durring high way speeds.
Versus what I have done on my car will benefit all the time since my intake filter isnt heat soaking in the hot engine bay during traffic idle situations or low speeds etc.


Side note:
Is anyone elses car running good with this cold weather?
My car is pulling lovely, even after several pulls my intercooler and piping is still ice cold on the cold side of the fmic piping. From stomping on first gear and doing a no lift to shift into 2nd (a eprom feature); i managed to make the rear tires start scooting due to being on the edge of having traction and not.
With my cold air intake im probably getting 20-30 deg temps seen at the mass air sensor at high way speeds in this weather!!! Air flow is more consistent, my cai gives me a more linear pull!